Furniture joint



4 3% M wm. wimpy? DRAPE URNITURE JOINT Filed March 19, 1923 IN VE N TOR fosler W Drape? A TTORNEY Patented Oct. 14, 1924. 1,511,273

UNITED STATES PATENT oFFlcE.

FOSTER W. 'DRAPER, OF SPOKANE, WASHINGTON.

FURNITURE JOINT.

Application filed March 19, 1923. Serial No. 625,941.

To all whom it may concern: Figure is a perspective view of a modi- Be it known that I, F'os'rnn IV. DRAPER, fied form of fastening cap. a citizen of the United States, residing at Figure 6 is a detail sectional view show- Spokane, in Spokane County, and State of ing the cap of Figure 5 in use with the 5 Washington, have invented certain new and anchoring key of Figure 1. 6

useful Improvements in Furniture Joints, Figure 7 is a further modified form of of which the following is a specification. the fastening cap for use with the anchor- My present invention relates to improveing key. ments in furniture joints and particularly to For convenience of description and illusthe fastening means for chairs and similar tration of my invention, it will be assumed articles of furniture, wherein it is necessary that the member 1 may be a chair leg havto make a rigid and permanent joint being the usual mortise or socket 2, and one tween two connecting members. Vhile I of the rounds of the chair is indicated at 3 shall hereinafter refer to the invention as and provided with a tenon-end 4e applied to chair joints, it will be under- The anchoring key 5 of the fastening stood that the invisible fastening means of means is a tube of suitable metal of proper my invention may with equal eiiiciency be length and diameter to adapt it for use and used in the construction of other articles of may be of various sizes for use in a variety furniture. of styles or sizes of furniture. At its ends 16 The primary object of my invention is the the tube is slit or split longitudinally as provision of an invisible and permanent at 6 and 6', and these slits form a plurality fastening means, which is comparatively inof e-Xpansible tongues 7 which are adapted expensive in cost of production, but is to be forced outwardly or spread, under capable of retaining the joined members of pressure, as indicated at 7 in Figure 4. To the piece of furniture in rigid relationship insure a spreading movement of these and well adapted to withstand wear and tongues as the slit end of the anchoring key use. The invention consists in certain novel is forced into the tenon of the round 3, the combinations and arrangements of parts as edges at the ends of the tube are beveled at will hereinafter be described and claimed. their inner sides, as at 8. These beveled In the accompanying drawings I have ilportions, when the anchoring tube is forced lustratedseveral forms of one of the fastenby suitable power into the tenon 3, (which ing members which is combined with the may be counterbored if necessary), to cause anchoring device of the fastening means, the tongues 7 to spread or turn out and showing the physical embodiment of the provide a rigid anchor in the wood for the principles of my invention. key. The invisible fastening means may be used In Figures 2, 3, and 1 the fastening cap to join a chair leg and chair round, or it 9 is in the form of a circular disk with a may be used to join the leg to the seat of a central opening 10 in order that it may be chair, and the fastening means is readily sli d er th ancl'lOllllg key and welded 40 adapted for use with numerous joints inor brazed, or rigidly secured thereon in volving a mortise or socket and tenon joint, other suitable manner. At its periphery the as hereinafter set forth. cap is provided with teeth 11, projecting at Figure 1 is a perspective view of an anan angle from the plane of the disk, and choring key of tubular construction, having as seen in Figure 2, these teeth are in posisplit ends, and adapted to be secured in the tion to be embedded in the chair leg 1, or in tenon member of the joint. the wall of its socket 2. IVith the key an- Figure 2 is a sectional detail view showchored in the tenon and the teeth of the cap ing a mortise and tenon joint, as between projecting from the end of the tenon, as the leg and round of a chair, in which the in Figure 2, it will be apparent that as the 50 joining process is partly completed. tenon is forced into its mortise or socket 2, 1

Figure 3 is a perspective view of the cap these teeth will be caused to penetrate the used with the anchoring key. wood of the chair leg within the socket and Figure 4 is a detail sectional view showspread, as indicated in Figure 41. One end ing a completed joint and the fastening of the anchoring key may be spread to members in use. form a head 12 on the cap as 111 Figures 2 and t which becomes embedded in the bottom ofthe mortise, and it will be apparent that as. the. tenon is forced into its socket the fastening means will join these. parts together with a rigid and permanent joint, as in Figure 4.

In Figures 5 and 6 the cap 13, with its opening 10 for coaction with the anchoring key, is fashioned with oppositely extending tongues 14 and 15, struck up or stamped from a blank by suitable dies. The eX- tremities of these oppositely extending tongues are provided with oppositely projecting teeth or spurs 17 and 1 6. In use the anchoring key is driven into the round 3 to retain the cap 13 on the end of: the tenon, and the inwardly projecting spurs 1.6 of the tongues 14E are forced into the exterior surface of the tenon. As the tenon is forced into its socket, the tongues 15 are spread. outwardly, and their teeth .17 are forced into the walls of the socket or. mortise, as in Figure 6 V The cap 18 in Figure 7 is adapted for use in a rectangular socket and with a rec-.

tangular tenon, instead of with the rounded tenon and socket of'Figures 2 and 41-. The cap 18 has the central opening 10 for. use with the anchoring key, and is provided with oppositely extending tongues 19 and 20 that are formed with oppositely projecting teeth 21 and 22. This cap is used in. the same manner as the cap 13.

From the above description taken in connection. with mydrawings it will bev obvious that. I have provided an invisible, or interior fastening means for'joints of this character, which will insure a rigid and permanent joint between the parts, and will prevent displacement, under ordinary wear for practically an indefinite time.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. An invisible fastening means for a furniture joint comprising. a tubular keyhaving a split at one end forming fastening tongues for one piece of the joint, a per forated cap affixed on said key, the other endv of the key being split and spread to form retaining tongues for the cap, and angu larly disposed retainingteeth on the cap or engagement with the other member of the joint. V

2. A fastening means fora furniturejoint comprising a tubular key having split ends forming end tongues, said tongues each having beveled edges whereby the tongues are spread outwardly when pressure is applied to the key, a perforated circular disk forn1- ing a cap affixed on said key, and, angularly disposed teeth on said cap projecting away from said key, forthe purpose described.

In testimony whereof I' affix my signature.

FOSTER W. DRAPER. 

